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Helga [31]
3 years ago
14

What type of molecules movement requires cells to expend energy

Biology
1 answer:
Tanzania [10]3 years ago
3 0

Answer: Active transport

Explanation: requires the cell to spend energy, usually in the form of ATP. Examples include the transport of large molecules (non-lipid soluble) and the sodium-potassium pump. Types of active transport.

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What are the characteristics of continental tropical air
Dafna1 [17]

Answer:

hot and dry

Explanation:

CONTINENTAL TROPICAL AIR MASS. The source region for cT air is the desert Southwest, the high plains and Mexico with relation to the United States. The air has low dewpoints and warm to hot afternoon temperatures but with mild nighttime temperature. Skies are generally clear in cT air.

4 0
2 years ago
A leaf falls from a tree and lands on the sidewalk. Identify an action-reaction pair in this situation.
Nuetrik [128]
<span>The leaf exerts a force on the sidewalk; the sidewalk exerts a force on the leaf.</span>
3 0
3 years ago
Doctors do not administer vaccinations to people who are too sick. Which best explains why?
4vir4ik [10]

Answer:

D, The white blood cells of sick people may not be able to efficiently handle the weakened or dead form of the pathogen.

Explanation:

Vaccinations are essentially just weak diseases we use to create antibodies so the body can protect itself from the full disease. If it sees it once, it can defend itself, is the theory. This is choice D.

  • Why not A: The weakened form will be attacked by the immune system, but maybe not enough, because the person is so sick that the immune system is busy elsewhere.
  • Why not B: The medication is not what combines with the vaccine to cause problems. It is the body being overworked.
  • Why not C: The digestive system isn't the issue. You don't eat diseases.
4 0
3 years ago
What plant physical structure or organ has a similar function to fish scales? Stem Stamen Bark Flower
borishaifa [10]

Answer:

Bark

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The scales on the fish serves as protection for the fish. And the tree bark serves as protection for the tree.

3 0
2 years ago
Convert 6.86kilometer into meter​
lesantik [10]

Answer:

6860m

Explanation:

1km = 1000m

6.86km = 6.86 × 1000m

             = 6860m

7 0
2 years ago
Read 2 more answers
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